1 // SPDX-License-Identifier: GPL-2.0
43 	u32 timeout = wdev->timeout * VISCONTI_WDT_FREQ;  in visconti_wdt_start()
45 	writel(priv->div, priv->base + WDT_DIV);  in visconti_wdt_start()
46 	writel(0, priv->base + WDT_MIN);  in visconti_wdt_start()
47 	writel(timeout, priv->base + WDT_MAX);  in visconti_wdt_start()
48 	writel(0, priv->base + WDT_CTL);  in visconti_wdt_start()
49 	writel(WDT_CMD_START_STOP, priv->base + WDT_CMD);  in visconti_wdt_start()
58 	writel(1, priv->base + WDT_CTL);  in visconti_wdt_stop()
59 	writel(WDT_CMD_START_STOP, priv->base + WDT_CMD);  in visconti_wdt_stop()
68 	writel(WDT_CMD_CLEAR, priv->base + WDT_CMD);  in visconti_wdt_ping()
76 	u32 timeout = wdev->timeout * VISCONTI_WDT_FREQ;  in visconti_wdt_get_timeleft()
77 	u32 cnt = readl(priv->base + WDT_CNT);  in visconti_wdt_get_timeleft()
81 	timeout -= cnt;  in visconti_wdt_get_timeleft()
91 	wdev->timeout = timeout;  in visconti_wdt_set_timeout()
92 	val = wdev->timeout * VISCONTI_WDT_FREQ;  in visconti_wdt_set_timeout()
94 	/* Clear counter before setting timeout because WDT expires */  in visconti_wdt_set_timeout()
95 	writel(WDT_CMD_CLEAR, priv->base + WDT_CMD);  in visconti_wdt_set_timeout()
96 	writel(val, priv->base + WDT_MAX);  in visconti_wdt_set_timeout()
103 	.identity = "Visconti Watchdog",
119 	struct device *dev = &pdev->dev;  in visconti_wdt_probe()
126 		return -ENOMEM;  in visconti_wdt_probe()
128 	priv->base = devm_platform_ioremap_resource(pdev, 0);  in visconti_wdt_probe()
129 	if (IS_ERR(priv->base))  in visconti_wdt_probe()
130 		return PTR_ERR(priv->base);  in visconti_wdt_probe()
138 		return -EINVAL;  in visconti_wdt_probe()
140 	priv->div = clk_freq / VISCONTI_WDT_FREQ;  in visconti_wdt_probe()
143 	wdev = &priv->wdev;  in visconti_wdt_probe()
144 	wdev->info = &visconti_wdt_info;  in visconti_wdt_probe()
145 	wdev->ops = &visconti_wdt_ops;  in visconti_wdt_probe()
146 	wdev->parent = dev;  in visconti_wdt_probe()
147 	wdev->min_timeout = 1;  in visconti_wdt_probe()
148 	wdev->max_timeout = 0xffffffff / VISCONTI_WDT_FREQ;  in visconti_wdt_probe()
149 	wdev->timeout = min(wdev->max_timeout, WDT_DEFAULT_TIMEOUT);  in visconti_wdt_probe()
164 	{ .compatible = "toshiba,visconti-wdt", },
178 MODULE_DESCRIPTION("TOSHIBA Visconti Watchdog Driver");